Gasket paste



Patented Sept. 22, 1936 UNITED STATES GASKET PASTE Charles W. Bailey, Dayton,

to Blue Rock Chemical mesne assignments,

Corporation of Virginia,

ginia Ohio, assignor, by

a corporation of Vir- No Drawing. Application July 10, 1929, Serial No. 377,322

15 Claims.

iGranted under the act of amended April 30, 1928;

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to compositions suitable for use for sealing purposes, or as lubricants, and is particularly concerned with such compositions which may be used as sealing media with or without gaskets, or as lubricants for high speed bearings developing intense heat.

Among the objects and advantages of the present invention there may be noted the production of such compositions which are insoluble in ordinary materials with which they may come in contact under the conditions of usage specifled above, such as gasoline, oil, water and steam. the resistance of such compositions to deterioration by high temperatures, and their substantial uniformity in consistency or viscosity under varying atmospheric conditions.

Other objects and advantages will appear from the more detailed description being set forth below, it being understood, however, that this more detailed description is given by way of illustration only, and not by way of limitation, since various changes may be made therein by those skilled in the art without departing from the scope and spirit of this invention.

In preparing compositions in accordance with 80 the present invention, it has been found that castor oil exercises a very desirable characteristic for such purposes. The castor oil is desirably utilized with other materials, such as soap, to add body thereto, and diiuents, such as glycerine,

to maintain the character of the composition.

The castor oil is desirably utilized after being subjected to a heat treatment, such heat treatment in the preferred instance being at temperatures higher than those to which the composition will be subjected in actual use.

manner, changes due to such high temperatures are avoided in the material after it has been compounded. A similar expedient may be utilized in connection with the other ingredients, that is the filler, bodiers and vehicles may, if desired, be subjected to heat treatments prior to their admixture and use for present purposes,

whereby stability is obtained.

The -following example illustrates a preferred composition made in accordance with the present invention, and it includes 40 per cent by weight of castor oil, 50 per cent by weight of soap and 10 per cent by weight of glycerine (commercial) For the preparation of this composition, a mixture of hot press and cold press castor and also tends to prevent In this 7 March 3, 1883, as

oil are found highly desirable, the soap being soft soap gives body to the composition, while glycerine serves to give a more uniform or smooth product, segregation of the oil from the composition. Equal parts by weight of the cold press and hot press castor oil are mixed and heated together to a temperature at which the oil mixture begins to thicken and darken in color. A temperature of about 540 F. may be used for this purpose. If desired, the thickening process may be hastened by adding small quantitles of water from time to time to the oil mixture during the heating step. The requisite quantity of soap is then heated to a temperature of about 180 R, such heating being continued until substantially all'of the water contained in the soap is driven on. The oil mixture and soap having thus been prepared, they are combined desirably while at the temperatures of 540 and 180 respectively. The material should be 20 thoroughly mixed together, but any type of mixing apparatus may be utilized. The short or crumbly appearance of the composition obtained by this procedure is avoided by the addition of the stated weight of glycerine, which desirably 25 is first heated to about 200 F. prior to admixture with the oil and soap composition. The resulting composition is permitted to cool slightly, and is then packaged for sale. As stated above, the glycerine may be omitted, 30 although'the composition is improved by its presence, and instead of glycerine other diluents may be utilized.

For example, the following gasket paste made of 50 per cent soft soap, 40 per cent lubricating castor 35 oil, 7 per cent olive oil, and 3 per cent of filler such as Spanish whiting may be utilized. In the preparation of this composition, the soft soap may be boiled slowly with a portion of the castor oil at a temperature at about 150 F., preferably until all water is boiled out of the soap. The remainder of the castor oil is boiled at a temperature of approximately 500 until substantially all of the water is boiled out of the oil, three hours being sufilcient for this purpose. The boiled oil is al- 4 lowed to cool to approximately 300 F.. and is then mixed with the soft soap composition. The olive oil and Spanish whiting are then added to form the final paste composition.

While castor oil is a preferred ingredient of the C0 compositions, other oils having similar propertie such as quince oil, may be utilized.

The compositions produced in accordance with the present invention possess very desirable properties as gasket pastes, or as lubricants. They are insoluble in gasoline, oil, water and steam, and therefore prevent leaks where .such materials are present. These compositions may, therefore, be used on gaskets, or metal to metal joints as at cylinder to crank case, and crank case sections, and joints of aviation machinery. The composition keeps the gasket in a soft and pliable condition, so that when the mechanism must be disassembled, such operation is readily conducted. When the compositions are blended at the higher temperatures specified, the usual temperature conditions met with an engine operation, or produced by friction do not affect such compositions. The pastes do not deteriorate, and maintain their consistency or viscosity under all unusual atmospheric conditions. In utilizing these compositions, the paste may be applied at V the point desired, and since no setting time is required, the mechanism may be utilized immediately.

The pastes of the present invention have been used successfully on aviation engines and on paper mill machinery, as well as on automobile engines, gas engines of all types, steam engines or on any mechanism where gaskets burn out, or where paste is applied on metal to metal joints.

What I claim is:

1. A composition of the class described comprising heat-treated castor oil, soft soap and glyc- 4 erine.

2. A composition of the class described comprising a mixture of heat-treated hot and cold press castor oil and soap.

3. A composition of the class described comprising a mixture of heat-treated hot and cold press castor oil, soft soap and glycerine.

4. A joint composition comprising heat-treated castor oil, soap and glycerine'in proportions by weight of approximately 40, and 10 respectively.

5. A joint composition comprising soft soap 50 parts, a mixture of heat-treated cold and hot press castor oil 40 parts, and glycerine 10 parts, the parts being by weight.

6. In a process of making a sealing composition, the steps of heating castor oil until it darkens in color, and mixing such heat-treated oil with soft soap.

'7. The process of making a sealing composition which comprises heat treating castor oil, soft soap and glycerine and admixing the heat treated materials.

8. The process of making a sealing composition which consists in heat treating castor oil, saponaceous material and glycerine, and admixing the heat treated materials.

9.'A composition of the class described comprising, castor oil that has been heat-treated at a temperature where it turns dark in color to materially increase its viscosity, a diluent of the class including glycerine and olive oil and a filler.

10. A composition of the class described comprising, castor oil that has been heat-treated at a temperature and for a period sunicient to darken its color and to materially increase its viscosity and a soap.

11. A composition of the. class described comprising castor oil that has been heat-treated at a temperature and for a period suflicient to cause it to darken in color and materially increase its viscosity and a diluent of the class including glycerine and olive oil.

12. A composition of the class described comprising castor oil that has been heat-treated at a temperature and for a period suflicient to cause it to darken in color and materially increase its viscosity and glycerine in sufiiclent amounts to maintain the character of the composition.

13. The process of making a sealing composition which consists in heat-treating castor oil to the point of dehydration to thereby obtain a change in color and a material increase in viscosity, in heat-treating a soap to the point of vdehydration and admixing the heat-treated materials.

14.-A composition of the class described comprising castor oil that has been heat-treated at a temperature and for a period suflicient to cause it to darken in color and materially increase its viscosity and a diluent of the class including glycerine at least about 10% by weight.

15. A sealing composition containing a gasoline immiscible, heat bodied castor oil, and a mineral filler in proportions to yield a gasket paste, the amount of bodied castor oil substantially exceeding the amount of mineral filler.

CHARLES W. BAILEY.

CERTIFICATE OF CORRECTION.

Patent No. 2,054,801. September 22, 1936.

CHARLES w. BAILEY.

ified that the above numbered patent was erroneously issued ion of Virginia",- as assignee by mesne assignld have been issued to the inventor, said Bailey e; and that the said Letterfl hat the same may conform to It is hereby cert to "Blue Book Chemical Corporat ments, whereas said patent shou as shown by the records of assignments in this offic Patent should be read with this correction therein t the record of the case in the Patent Office.

Signed and sealed this 23rd day of March, A. D. 1937.

Henry Van Arsdale (Seal) Acting Commissioner of Patents. 

